HT instruments FULLTEST3 - Manual (Page 25)

FULLTEST 3
EN - 24
CAUTION
 Connect COM test lead to chassis if the UUT is grounded. In case of reversed
test leads measurement result may be affected by instrument’s internal
resistance of 10 M
!
 Due to the measurement of insulation resistance, capacitive UUT will be
charged with test voltage. The UUT will be discharged after finishing the
measurement via internal resistance of approx. 2 M
. The UUT can retain
dangerous voltage in case of premature removal of test leads. Ensure that the
UUT is discharged through the measurement instrument (not through short
circuit)!
 Measurement time in MANUAL mode is limited to 60 min!
The following specific information can be shown on the display during the measurement:
Information displayed Description
EXTERNAL VOLTAGE
 External voltage higher than 10 VAC approx. is applied
between positive and negative test terminals
(measurement is not running) or higher than 50 VAC
approx. (measurement is running).
 Negative external voltage higher than 10 VDC approx. is
applied between positive and negative test terminals
(measurement is running).
Remove external voltage!
DISCHARGING!
External capacitor (or internal) that was charged during the
measurement is discharging.
Wait until the message disappears! Do not disconnect test
leads until the message is present!